Thomas St Lawrence, 1st Earl of Howth (10 May 1730 – 29 September 1801) was Anglo-Irish peer and lawyer.
Howth was the eldest son of William St Lawrence, 14th Baron Howth and Lucy Gorges, daughter of General Richard Gorges and his first wife Nichola Sophia Hamilton.He was educated at Trinity College, Dublin.
On 4 April 1748, he succeeded to his father's barony. In 1776, the Crown granted Howth a yearly pension of £500 in consideration of his own and his ancestors' services. He was a qualified barrister, and was elected as a Bencher of King's Inns in Dublin in 1767. On 3 September that same year he was created Earl of Howth and Viscount St Lawrence, both in the Peerage of Ireland.He was made a member of the Privy Council of Ireland in 1768.
He married Isabella King, daughter of Sir Henry King, 3rd Baronet and Isabella Wingfield, daughter of Edward Wingfield and sister of Richard, 1st Viscount Powerscourt, on 17 November 1750. Together they had six children. His eldest son Henry predeceased him, and he was succeeded by his second son, William. A younger son, Thomas, was Bishop of Cork and Ross 1807-1831: he had six children, but all his sons died without issue.
The Earl's eldest daughter, the third Isabella, married Dudley Cosby, 1st Baron Sydney, in 1773, but was widowed almost at once. She outlived him by more than 60 years. The youngest daughter, Frances, married as his second wife James Phillott, Archdeacon of Bath, a marriage which gave rise to caustic comments from Jane Austen about the desperation of Frances, who was well over forty, to find a husband of any description (Phillott being almost sixty at the time, and a widower). Frances died in 1842. The third daughter Elizabeth married the distinguished soldier General Sir Paulus Irving, Commander in Chief of the West Indies, and first of the Irving Baronets. She died in 1799, leaving issue.
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Events from the year 1767 in Ireland.
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Thomas St Lawrence was Bishop of Cork and Ross from 1807 and died in post on 10 February 1831. He had previously been Dean of Cork.
Nicholas St Lawrence, 11th Baron Howth (1597–1643) was an Anglo-Irish nobleman of the seventeenth century. The Lords of Howth for over a century had played a crucial role in Irish politics; but Nicholas, unlike many of his ancestors, preferred to lead a quiet domestic life. During the English Civil War, his loyalty to the English Crown led to the forfeiture of much of his property, and the troubles he endured during the conflict are said to have hastened his death.
Thomas St Lawrence, 13th Baron Howth (1659–1727) was an Irish nobleman of the later Stuart and early Georgian era.
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William St Lawrence, 2nd Earl of Howth was an Anglo-Irish peer, styled Viscount St Lawrence from 1767 to 1801. He was the eldest son of Thomas St Lawrence, 1st Earl of Howth and Isabella King, daughter of Sir Henry King, 3rd Baronet and Isabella Wingfield.